Update CHANGELOG for v1.9.0 release (#6811)

Author: ytmimi

CHANGELOG.md

@@ -3,7 +3,7 @@
 ## [Unreleased]
 
 
-## [1.9.0] 2025-01-03
+## [1.9.0] 2026-02-26
 
 ### Fixed
 - No longer strip `r#` prefix from `break` and `continue` labels [#6411](https://github.com/rust-lang/rustfmt/issues/6411)
@@ -17,6 +17,14 @@
 - Fix panic when sorting imports [#6333](https://github.com/rust-lang/rustfmt/issues/6333)
 - Fix issue with `wrap_comments` invalidating code blocks [#6417](https://github.com/rust-lang/rustfmt/pull/6417)
 - No longer remove closure block label within a macro call [#6465](https://github.com/rust-lang/rustfmt/issues/6465)
+- Fix idempotency issue when normalizing imports [#6558](https://github.com/rust-lang/rustfmt/issues/6558)
+- Properly split long pattern in `if-let` at the `max_width` when setting `style_edition=2027` [#6202](https://github.com/rust-lang/rustfmt/issues/6202)
+- Format `lazy_static::lazy_static!` like `lazy_static!` when setting `style_edition=2027` [#6287](https://github.com/rust-lang/rustfmt/issues/6287)
+- Prevent panic when rewriting missing spans that contain unicode whitespace chars [#5739](https://github.com/rust-lang/rustfmt/issues/5739)
+- Allow `NotADirectory` errors when looking up rustfmt configuration files [#6624](https://github.com/rust-lang/rustfmt/pull/6624)
+- Prevent panic when sorting imports starting with a `_` for `style_edition=2015|2018|2021` [#6668](https://github.com/rust-lang/rustfmt/issues/6668)
+- Properly wrap long `impl trait` function parameters at the `max_width` when setting `style_edition=2027` [#6381](https://github.com/rust-lang/rustfmt/issues/6381)
+- Better support for deduplicating imports when setting `imports_granularity=Module` [#6243](https://github.com/rust-lang/rustfmt/issues/6243)
 
 ### Changed
 - Stabilize `style_edition=2024` and stabilize the `style_edition` command line option [#6431](https://github.com/rust-lang/rustfmt/pull/6431) [rust-lang/rust#134929](https://github.com/rust-lang/rust/pull/134929)
@@ -25,12 +33,30 @@
 - Correct version chunk splitting in the internal version sort algorithm [#6407](https://github.com/rust-lang/rustfmt/pull/6407)
 - Extend support for single line let-chain formatting to include cases where the left hand side operand is a literal, in alignment with finalized style rules as part of let-chain stabilization [#6492](https://github.com/rust-lang/rustfmt/pull/6492)
 - Begin initial formatting for `use closures` and `use chains` (`#![feature(ergonomic_clones)]`). Previously, the closure and chain was left as the developer wrote it [#6532](https://github.com/rust-lang/rustfmt/pull/6532)
+- The unstable `required_version` configuration option now support cargo flavored semantic versioning using the `semver` crate [#6063](https://github.com/rust-lang/rustfmt/issues/6063)
+- Top-level imports are no longer merged when setting `imports_granularity=Module`. Note that `imports_granularity=Module` is still an unstable configuration [#6191](https://github.com/rust-lang/rustfmt/issues/6191)
+- Disable the `bytecount/generic-simd` optional dependency when using the `generic-simd` feature. The dependency was preventing rustfmt from building on nightly. simd support will be re-enabled once the issue has been fixed [#6807](https://github.com/rust-lang/rustfmt/pull/6807) [llogiq/bytecount#100](https://github.com/llogiq/bytecount/pull/100)
+- The `trailing_semicolon` configuration option will add a trailing semicolon to the last expression in a loop body when enabled along with `edition >= 2024` and `style_edition >= 2027` [#6711](https://github.com/rust-lang/rustfmt/pull/6711)
+  ```rust
+  fn main() {
+      for x in 0..10 {
+          println!("{x}");
+      }
+  }
+  ```
+
 
 ### Added
 - Add `style_edition=2027` to gate unstable formatting [#6324](https://github.com/rust-lang/rustfmt/pull/6324)
 - Support discovering and formatting files via external mods imported within `cfg_match`, similar to `cfg_if` behavior [#6522](https://github.com/rust-lang/rustfmt/pull/6522)
 - Add new nightly-only `match_arm_indent` option [#6525](https://github.com/rust-lang/rustfmt/pull/6525)
-  - more details in the [configuration section for this new option](https://github.com/rust-lang/rustfmt/blob/HEAD/Configurations.md#match_arm_indent)
+  - See the [`match_arm_indent` configuration documentation](https://rust-lang.github.io/rustfmt/?version=v1.9.0&search=#match_arm_indent) for more details
+- Add new nightly-only `float_literal_trailing_zero` option [#3187](https://github.com/rust-lang/rustfmt/issues/3187)
+  - See the [`float_literal_trailing_zero` configuration documentation](https://rust-lang.github.io/rustfmt/?version=v1.9.0&search=#float_literal_trailing_zero) for more details
+
+### Misc
+- Update `term` dependency to 1.1 [#6628](https://github.com/rust-lang/rustfmt/pull/6628)
+- Update `toml` dependency to 0.9.5 [#6652](https://github.com/rust-lang/rustfmt/pull/6652)
 
 
 ## [1.8.0] 2024-09-20